The A2L reports its 4-slot AMS Lite as unit id 16, but its slot-presence
bitmasks sit at bit base 24 (id 6) and it reports tray_now as a local 0-3
slot. Fed the raw id 16, the ams_id*4+slot convention probed bits 64-67
(always zero) and marked loaded slots empty; the local tray_now was read as
global, so usage deducted from the wrong spool (or not at all); and the
ams_id<=7 DB constraint rejected id-16 Spoolman links.
Normalise the Lite 16->6 at the MQTT ingest boundary so global tray ids land
at 24-27 - matching the firmware's own bit base, working with every existing
ams_id*4+slot consumer, colliding with nothing, and passing the DB
constraint. Globalise tray_now to 24+slot, widen the valid-tray guards, label
the unit "AMS Lite", and build the confirmed ams_mapping2 {ams_id:16,
slot_id:0-3} / flat 0-3 for dispatch. Outbound slot commands translate 6->16
on the wire via a single helper. Self-scoping: only unit id 16 is touched, so
all other printers/AMS types are unaffected. One uncaptured wire field (the
physical global tray on load/cali) is extrapolated and isolated to the helper.
notify_missing_spool_assignments_on_print_start queried only the legacy
SpoolAssignment table. In Spoolman mode that table is empty -- bindings
live in spoolman_slot_assignments -- so assigned_global_trays came back
empty and every used tray was flagged missing, firing a false-positive
notification on every print.
Union SpoolAssignment + SpoolmanSlotAssignment rows for the printer
before computing the missing set. Both tables expose printer_id /
ams_id / tray_id identically, so _global_tray_from_assignment is
unchanged. Union-only, so legacy-mode behavior cannot regress.
maziggy